1200W Electric Stair Climbing Dolly Body Material: Carben Steel,Rubber Charging time: 4h Maximum load: 880 lbs Net weight: 77 lbs Unfolded size: 21.6*11.8*49.2 in Folded size: 21.6*25.6*63 in Loading plate: 15.7*13.7 in Stair climbing speed: 20-60step/…